syzkaller login: [ 31.201175] BUG: Bad rss-counter state mm:000000006cc86a82 type:MM_FILEPAGES val:33 [ 31.202484] BUG: Bad rss-counter state mm:000000006cc86a82 type:MM_ANONPAGES val:22 [ 31.353589] ================================================================== [ 31.354491] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.355429] Read of size 8 at addr ffff88800ef5f968 by task sshd/220 [ 31.356208] [ 31.356428] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.357450] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.358465] Call Trace: [ 31.358794] [ 31.359105] dump_stack_lvl+0x91/0xf0 [ 31.359600] print_report+0xcc/0x620 [ 31.360098] ? __virt_addr_valid+0x102/0x340 [ 31.360645] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361286] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.361899] kasan_report+0xbe/0xf0 [ 31.362364] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362976] vma_interval_tree_remove+0xc75/0xec0 [ 31.363576] vma_prepare+0xc54/0x11a0 [ 31.364046] __split_vma+0x5af/0x950 [ 31.364511] ? __pfx___split_vma+0x10/0x10 [ 31.365037] ? find_held_lock+0x2c/0x110 [ 31.365556] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.366112] ? lock_is_held_type+0x9f/0x120 [ 31.366654] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.367257] ? mtree_range_walk+0x632/0x900 [ 31.367804] ? mas_walk+0x5c7/0x7c0 [ 31.368274] do_vmi_munmap+0x1f1/0x2b0 [ 31.368763] mmap_region+0x1f9/0x2660 [ 31.369251] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.369758] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.370483] ? __pfx_lock_acquire+0x10/0x10 [ 31.371014] ? __pfx_mmap_region+0x10/0x10 [ 31.371541] ? security_mmap_addr+0x7d/0xa0 [ 31.372063] ? get_unmapped_area+0x1f5/0x3f0 [ 31.372606] do_mmap+0x854/0xf00 [ 31.373056] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.373542] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.374106] ksys_mmap_pgoff+0x3af/0x500 [ 31.374603] do_syscall_64+0x3f/0x90 [ 31.375074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.375713] RIP: 0033:0x7f8a68206d82 [ 31.376162] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.378275] RSP: 002b:00007ffca260f938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.379167] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8a68206d82 [ 31.380004] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8a67640000 [ 31.380860] RBP: 00007f8a67640000 R08: 0000000000000009 R09: 0000000000001000 [ 31.381696] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565250cbed90 [ 31.382534] R13: 00007ffca260f950 R14: 00007ffca260f980 R15: 00007ffca260fce0 [ 31.383380] [ 31.383674] [ 31.383886] Allocated by task 213: [ 31.384311] kasan_save_stack+0x22/0x50 [ 31.384806] kasan_set_track+0x25/0x30 [ 31.385318] __kasan_slab_alloc+0x59/0x70 [ 31.385847] kmem_cache_alloc+0x16b/0x370 [ 31.386364] vm_area_dup+0x20/0x160 [ 31.386816] __split_vma+0x170/0x950 [ 31.387275] split_vma+0xc6/0x110 [ 31.387710] mprotect_fixup+0x8d2/0xb30 [ 31.388217] do_mprotect_pkey+0x87e/0xd40 [ 31.388745] __x64_sys_mprotect+0x78/0xc0 [ 31.389289] do_syscall_64+0x3f/0x90 [ 31.389770] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.390411] [ 31.390632] Freed by task 213: [ 31.391023] kasan_save_stack+0x22/0x50 [ 31.391530] kasan_set_track+0x25/0x30 [ 31.392031] kasan_save_free_info+0x2b/0x50 [ 31.392574] __kasan_slab_free+0x10a/0x190 [ 31.393117] kmem_cache_free+0x10d/0x4d0 [ 31.393630] rcu_core+0x8c8/0x2860 [ 31.394088] __do_softirq+0x1b7/0x7d4 [ 31.394570] [ 31.394796] Last potentially related work creation: [ 31.395383] kasan_save_stack+0x22/0x50 [ 31.395885] __kasan_record_aux_stack+0x8e/0xa0 [ 31.396457] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.397117] remove_vma+0x139/0x170 [ 31.397572] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.398138] do_vmi_munmap+0x1f1/0x2b0 [ 31.398634] __vm_munmap+0x138/0x3a0 [ 31.399097] __x64_sys_munmap+0x59/0x80 [ 31.399586] do_syscall_64+0x3f/0x90 [ 31.400058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.400690] [ 31.400923] The buggy address belongs to the object at ffff88800ef5f910 [ 31.400923] which belongs to the cache vm_area_struct of size 168 [ 31.402371] The buggy address is located 88 bytes inside of [ 31.402371] freed 168-byte region [ffff88800ef5f910, ffff88800ef5f9b8) [ 31.403746] [ 31.403959] The buggy address belongs to the physical page: [ 31.404617] page:00000000b3bb78fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef5f [ 31.405690] memcg:ffff88800c85aa01 [ 31.406113] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.406750] page_type: 0xffffffff() [ 31.407192] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.408103] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c85aa01 [ 31.409015] page dumped because: kasan: bad access detected [ 31.409667] [ 31.409879] Memory state around the buggy address: [ 31.410456] ffff88800ef5f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.411299] ffff88800ef5f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.412140] >ffff88800ef5f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413004] ^ [ 31.413781] ffff88800ef5f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.414628] ffff88800ef5fa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.415467] ================================================================== [ 31.416431] Disabling lock debugging due to kernel taint [ 33.386952] BUG: Bad rss-counter state mm:000000006d1114d0 type:MM_FILEPAGES val:33 [ 33.388047] BUG: Bad rss-counter state mm:000000006d1114d0 type:MM_ANONPAGES val:22 [ 33.939235] BUG: Bad rss-counter state mm:000000009b5855bc type:MM_FILEPAGES val:33 [ 33.940418] BUG: Bad rss-counter state mm:000000009b5855bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24486' (ECDSA) to the list of known hosts. 2023/06/20 16:13:41 fuzzer started 2023/06/20 16:13:42 dialing manager at localhost:36067 2023/06/20 16:13:42 checking machine... 2023/06/20 16:13:42 checking revisions... [ 34.585951] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:13:42 testing simple program... [ 34.634237] cgroup: Unknown subsys name 'net' [ 34.687352] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:13:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888019c979d8 RCX=0000000000000000 RDX=ffff88800ea5b680 RSI=0000000000000008 RDI=ffff888016ae22b8 RBP=ffff888016ae22b8 RSP=ffff888019c97728 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800b850000 R13=ffff88800b850018 R14=ffff88800b850138 R15=0000000000000000 RIP=ffffffff8180fea0 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2bbbfff700 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f1d67db30b0 CR3=0000000019d5a000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031343a33313a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33313a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f526c152160 CR3=000000000c772000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=e25371fde52a528e7f41f5c8fa55cc66 XMM02=000000000011d7d0eff9b2d0a8fce9cb XMM03=000000000011d8a02c67c8bc2e329bc3 XMM04=adb84748514d17ee00000000000ae988 XMM05=19e9129bd510f2350000000000131e60 XMM06=f9ec2d6167b3a6590000000000130cc8 XMM07=e042d86d42eb936e0000000000122260 XMM08=f3ef519c838b20ab000000000011d8a0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000